Determining the age distribution of Colle Gnifetti, Monte Rosa, Swiss Alps, by combining ice cores, ground-penetrating radar and a simple flow model
Ice cores from cold Alpine glaciers may provide unique paleoclimate information from non-polar latitudes. We explore the three-dimensional internal age distribution of the small cold glacier saddle (Colle Gnifetti, Monte Rosa, Italy/Switzerland) to compare the age/depth relations from four local dee...
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Online Access: | https://hdl.handle.net/10278/5014729 https://doi.org/10.3189/2013JoG12J072 |
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ftuniveneziairis:oai:iris.unive.it:10278/5014729 2024-04-14T08:13:06+00:00 Determining the age distribution of Colle Gnifetti, Monte Rosa, Swiss Alps, by combining ice cores, ground-penetrating radar and a simple flow model Konrad H. Bohleber P. Wagenbach D. Vincent C. Eisen O. Konrad, H. Bohleber, P. Wagenbach, D. Vincent, C. Eisen, O. 2013 https://hdl.handle.net/10278/5014729 https://doi.org/10.3189/2013JoG12J072 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000316373500017 volume:59 issue:213 firstpage:179 lastpage:189 numberofpages:11 journal:JOURNAL OF GLACIOLOGY https://hdl.handle.net/10278/5014729 doi:10.3189/2013JoG12J072 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84878359628 Settore GEO/08 - Geochimica e Vulcanologia Settore GEO/05 - Geologia Applicata info:eu-repo/semantics/article 2013 ftuniveneziairis https://doi.org/10.3189/2013JoG12J072 2024-03-21T18:11:36Z Ice cores from cold Alpine glaciers may provide unique paleoclimate information from non-polar latitudes. We explore the three-dimensional internal age distribution of the small cold glacier saddle (Colle Gnifetti, Monte Rosa, Italy/Switzerland) to compare the age/depth relations from four local deep ice cores. Tracking isochronous reflection horizons detected by ground-penetrating radar (GPR) among the core locations reveals consistent dating up to 80 years bp. This approach is confined to recent ages, due to the lack of clear reflections below the firn/ice transition.We attempt to overcome this limitation by including a two-dimensional flow model adapted to the GPR-derived surface accumulation and ice thickness distribution. Modeled and GPR isochrones are compared, indicating agreement in shape but featuring a potential offset of 0-3.5 m. The modeled isochrones are interpolated to the core array with ages assigned according to the ice-core datings. The resulting age distribution is consistent up to 110 years bp, with age uncertainties increasing from 7 to >80 years in the lower half of the ice. This combination of methods is novel for Alpine sites and may be adapted for spatial extrapolation of ice properties other than age. Article in Journal/Newspaper ice core Università Ca’ Foscari Venezia: ARCA (Archivio Istituzionale della Ricerca) Monte Rosa ENVELOPE(162.850,162.850,-70.917,-70.917) Journal of Glaciology 59 213 179 189 |
institution |
Open Polar |
collection |
Università Ca’ Foscari Venezia: ARCA (Archivio Istituzionale della Ricerca) |
op_collection_id |
ftuniveneziairis |
language |
English |
topic |
Settore GEO/08 - Geochimica e Vulcanologia Settore GEO/05 - Geologia Applicata |
spellingShingle |
Settore GEO/08 - Geochimica e Vulcanologia Settore GEO/05 - Geologia Applicata Konrad H. Bohleber P. Wagenbach D. Vincent C. Eisen O. Determining the age distribution of Colle Gnifetti, Monte Rosa, Swiss Alps, by combining ice cores, ground-penetrating radar and a simple flow model |
topic_facet |
Settore GEO/08 - Geochimica e Vulcanologia Settore GEO/05 - Geologia Applicata |
description |
Ice cores from cold Alpine glaciers may provide unique paleoclimate information from non-polar latitudes. We explore the three-dimensional internal age distribution of the small cold glacier saddle (Colle Gnifetti, Monte Rosa, Italy/Switzerland) to compare the age/depth relations from four local deep ice cores. Tracking isochronous reflection horizons detected by ground-penetrating radar (GPR) among the core locations reveals consistent dating up to 80 years bp. This approach is confined to recent ages, due to the lack of clear reflections below the firn/ice transition.We attempt to overcome this limitation by including a two-dimensional flow model adapted to the GPR-derived surface accumulation and ice thickness distribution. Modeled and GPR isochrones are compared, indicating agreement in shape but featuring a potential offset of 0-3.5 m. The modeled isochrones are interpolated to the core array with ages assigned according to the ice-core datings. The resulting age distribution is consistent up to 110 years bp, with age uncertainties increasing from 7 to >80 years in the lower half of the ice. This combination of methods is novel for Alpine sites and may be adapted for spatial extrapolation of ice properties other than age. |
author2 |
Konrad, H. Bohleber, P. Wagenbach, D. Vincent, C. Eisen, O. |
format |
Article in Journal/Newspaper |
author |
Konrad H. Bohleber P. Wagenbach D. Vincent C. Eisen O. |
author_facet |
Konrad H. Bohleber P. Wagenbach D. Vincent C. Eisen O. |
author_sort |
Konrad H. |
title |
Determining the age distribution of Colle Gnifetti, Monte Rosa, Swiss Alps, by combining ice cores, ground-penetrating radar and a simple flow model |
title_short |
Determining the age distribution of Colle Gnifetti, Monte Rosa, Swiss Alps, by combining ice cores, ground-penetrating radar and a simple flow model |
title_full |
Determining the age distribution of Colle Gnifetti, Monte Rosa, Swiss Alps, by combining ice cores, ground-penetrating radar and a simple flow model |
title_fullStr |
Determining the age distribution of Colle Gnifetti, Monte Rosa, Swiss Alps, by combining ice cores, ground-penetrating radar and a simple flow model |
title_full_unstemmed |
Determining the age distribution of Colle Gnifetti, Monte Rosa, Swiss Alps, by combining ice cores, ground-penetrating radar and a simple flow model |
title_sort |
determining the age distribution of colle gnifetti, monte rosa, swiss alps, by combining ice cores, ground-penetrating radar and a simple flow model |
publishDate |
2013 |
url |
https://hdl.handle.net/10278/5014729 https://doi.org/10.3189/2013JoG12J072 |
long_lat |
ENVELOPE(162.850,162.850,-70.917,-70.917) |
geographic |
Monte Rosa |
geographic_facet |
Monte Rosa |
genre |
ice core |
genre_facet |
ice core |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000316373500017 volume:59 issue:213 firstpage:179 lastpage:189 numberofpages:11 journal:JOURNAL OF GLACIOLOGY https://hdl.handle.net/10278/5014729 doi:10.3189/2013JoG12J072 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84878359628 |
op_doi |
https://doi.org/10.3189/2013JoG12J072 |
container_title |
Journal of Glaciology |
container_volume |
59 |
container_issue |
213 |
container_start_page |
179 |
op_container_end_page |
189 |
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1796311010234073088 |